The true nature of "money" discovered by humanity: From the birth of currency to crypto assets

Have you ever seen a giant stone currency carried by a primitive man in a manga or something? That currency actually exists. It is located on Yap Island in the Federated States of Micronesia. Even in the 19th century, this island had almost no exchange with the surrounding islands, and the islanders lived in an extremely primitive society.

For this reason, from the end of the 19th century to the beginning of the 20th century, many scholars visited the island to investigate it as a valuable sample to observe primitive human society. What they saw was a giant stone currency called "fey" that seemed impossible to carry.

It ranges in diameter from about 30 cm to nearly 3 m, and the largest ones weigh over 1 ton. The characteristics of fey are that they were specially cut and transported from a distant island, and because they are too heavy, they are not carried like normal currency. Even if this currency was used for buying and selling, it was never handed over to the other party, but was left in front of the house or on the roadside.